3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <stdio_dev.h>
28 #include <linux/ctype.h>
29 #include <linux/types.h>
30 #include <asm/global_data.h>
32 #include <fdt_support.h>
36 * Global data (for the gd->bd)
38 DECLARE_GLOBAL_DATA_PTR;
41 * fdt_getprop_u32_default - Find a node and return it's property or a default
43 * @fdt: ptr to device tree
45 * @prop: property name
46 * @dflt: default value if the property isn't found
48 * Convenience function to find a node and return it's property or a
49 * default value if it doesn't exist.
51 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
52 const char *prop, const u32 dflt)
57 off = fdt_path_offset(fdt, path);
61 val = fdt_getprop(fdt, off, prop, NULL);
63 return fdt32_to_cpu(*val);
69 * fdt_find_and_setprop: Find a node and set it's property
71 * @fdt: ptr to device tree
73 * @prop: property name
74 * @val: ptr to new value
75 * @len: length of new property value
76 * @create: flag to create the property if it doesn't exist
78 * Convenience function to directly set a property given the path to the node.
80 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
81 const void *val, int len, int create)
83 int nodeoff = fdt_path_offset(fdt, node);
88 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
89 return 0; /* create flag not set; so exit quietly */
91 return fdt_setprop(fdt, nodeoff, prop, val, len);
94 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
96 #ifdef CONFIG_CONS_INDEX
97 static void fdt_fill_multisername(char *sername, size_t maxlen)
99 const char *outname = stdio_devices[stdout]->name;
101 if (strcmp(outname, "serial") > 0)
102 strncpy(sername, outname, maxlen);
105 if (strcmp(outname + 1, "serial") > 0)
106 strncpy(sername, outname + 1, maxlen);
110 static int fdt_fixup_stdout(void *fdt, int chosenoff)
113 #ifdef CONFIG_CONS_INDEX
115 char sername[9] = { 0 };
118 fdt_fill_multisername(sername, sizeof(sername) - 1);
120 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
122 err = node = fdt_path_offset(fdt, "/aliases");
125 path = fdt_getprop(fdt, node, sername, &len);
127 char *p = malloc(len);
128 err = -FDT_ERR_NOSPACE;
130 memcpy(p, path, len);
131 err = fdt_setprop(fdt, chosenoff,
132 "linux,stdout-path", p, len);
141 printf("WARNING: could not set linux,stdout-path %s.\n",
148 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
156 /* Find the "chosen" node. */
157 nodeoffset = fdt_path_offset (fdt, "/chosen");
159 /* If there is no "chosen" node in the blob return */
160 if (nodeoffset < 0) {
161 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
165 /* just return if initrd_start/end aren't valid */
166 if ((initrd_start == 0) || (initrd_end == 0))
169 total = fdt_num_mem_rsv(fdt);
172 * Look for an existing entry and update it. If we don't find
173 * the entry, we will j be the next available slot.
175 for (j = 0; j < total; j++) {
176 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
177 if (addr == initrd_start) {
178 fdt_del_mem_rsv(fdt, j);
183 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
185 printf("fdt_initrd: %s\n", fdt_strerror(err));
189 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
190 if ((path == NULL) || force) {
191 tmp = cpu_to_fdt32(initrd_start);
192 err = fdt_setprop(fdt, nodeoffset,
193 "linux,initrd-start", &tmp, sizeof(tmp));
196 "could not set linux,initrd-start %s.\n",
200 tmp = cpu_to_fdt32(initrd_end);
201 err = fdt_setprop(fdt, nodeoffset,
202 "linux,initrd-end", &tmp, sizeof(tmp));
204 printf("WARNING: could not set linux,initrd-end %s.\n",
214 int fdt_chosen(void *fdt, int force)
218 char *str; /* used to set string properties */
221 err = fdt_check_header(fdt);
223 printf("fdt_chosen: %s\n", fdt_strerror(err));
228 * Find the "chosen" node.
230 nodeoffset = fdt_path_offset (fdt, "/chosen");
233 * If there is no "chosen" node in the blob, create it.
235 if (nodeoffset < 0) {
237 * Create a new node "/chosen" (offset 0 is root level)
239 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
240 if (nodeoffset < 0) {
241 printf("WARNING: could not create /chosen %s.\n",
242 fdt_strerror(nodeoffset));
248 * Create /chosen properites that don't exist in the fdt.
249 * If the property exists, update it only if the "force" parameter
252 str = getenv("bootargs");
254 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
255 if ((path == NULL) || force) {
256 err = fdt_setprop(fdt, nodeoffset,
257 "bootargs", str, strlen(str)+1);
259 printf("WARNING: could not set bootargs %s.\n",
264 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
265 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
266 if ((path == NULL) || force)
267 err = fdt_fixup_stdout(fdt, nodeoffset);
270 #ifdef OF_STDOUT_PATH
271 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
272 if ((path == NULL) || force) {
273 err = fdt_setprop(fdt, nodeoffset,
274 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
276 printf("WARNING: could not set linux,stdout-path %s.\n",
284 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
285 const void *val, int len, int create)
289 debug("Updating property '%s/%s' = ", path, prop);
290 for (i = 0; i < len; i++)
291 debug(" %.2x", *(u8*)(val+i));
294 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
296 printf("Unable to update property %s:%s, err=%s\n",
297 path, prop, fdt_strerror(rc));
300 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
303 fdt32_t tmp = cpu_to_fdt32(val);
304 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
307 void do_fixup_by_prop(void *fdt,
308 const char *pname, const void *pval, int plen,
309 const char *prop, const void *val, int len,
315 debug("Updating property '%s' = ", prop);
316 for (i = 0; i < len; i++)
317 debug(" %.2x", *(u8*)(val+i));
320 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
321 while (off != -FDT_ERR_NOTFOUND) {
322 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
323 fdt_setprop(fdt, off, prop, val, len);
324 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
328 void do_fixup_by_prop_u32(void *fdt,
329 const char *pname, const void *pval, int plen,
330 const char *prop, u32 val, int create)
332 fdt32_t tmp = cpu_to_fdt32(val);
333 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
336 void do_fixup_by_compat(void *fdt, const char *compat,
337 const char *prop, const void *val, int len, int create)
342 debug("Updating property '%s' = ", prop);
343 for (i = 0; i < len; i++)
344 debug(" %.2x", *(u8*)(val+i));
347 off = fdt_node_offset_by_compatible(fdt, -1, compat);
348 while (off != -FDT_ERR_NOTFOUND) {
349 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
350 fdt_setprop(fdt, off, prop, val, len);
351 off = fdt_node_offset_by_compatible(fdt, off, compat);
355 void do_fixup_by_compat_u32(void *fdt, const char *compat,
356 const char *prop, u32 val, int create)
358 fdt32_t tmp = cpu_to_fdt32(val);
359 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
363 * Get cells len in bytes
364 * if #NNNN-cells property is 2 then len is 8
367 static int get_cells_len(void *blob, char *nr_cells_name)
371 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
372 if (cell && fdt32_to_cpu(*cell) == 2)
379 * Write a 4 or 8 byte big endian cell
381 static void write_cell(u8 *addr, u64 val, int size)
383 int shift = (size - 1) * 8;
385 *addr++ = (val >> shift) & 0xff;
390 #ifdef CONFIG_NR_DRAM_BANKS
391 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
393 #define MEMORY_BANKS_MAX 4
395 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
398 int addr_cell_len, size_cell_len, len;
399 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
402 if (banks > MEMORY_BANKS_MAX) {
403 printf("%s: num banks %d exceeds hardcoded limit %d."
404 " Recompile with higher MEMORY_BANKS_MAX?\n",
405 __FUNCTION__, banks, MEMORY_BANKS_MAX);
409 err = fdt_check_header(blob);
411 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
415 /* update, or add and update /memory node */
416 nodeoffset = fdt_path_offset(blob, "/memory");
417 if (nodeoffset < 0) {
418 nodeoffset = fdt_add_subnode(blob, 0, "memory");
420 printf("WARNING: could not create /memory: %s.\n",
421 fdt_strerror(nodeoffset));
424 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
427 printf("WARNING: could not set %s %s.\n", "device_type",
432 addr_cell_len = get_cells_len(blob, "#address-cells");
433 size_cell_len = get_cells_len(blob, "#size-cells");
435 for (bank = 0, len = 0; bank < banks; bank++) {
436 write_cell(tmp + len, start[bank], addr_cell_len);
437 len += addr_cell_len;
439 write_cell(tmp + len, size[bank], size_cell_len);
440 len += size_cell_len;
443 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
445 printf("WARNING: could not set %s %s.\n",
446 "reg", fdt_strerror(err));
452 int fdt_fixup_memory(void *blob, u64 start, u64 size)
454 return fdt_fixup_memory_banks(blob, &start, &size, 1);
457 void fdt_fixup_ethernet(void *fdt)
460 char enet[16], *tmp, *end;
461 char mac[16] = "ethaddr";
463 unsigned char mac_addr[6];
465 node = fdt_path_offset(fdt, "/aliases");
470 while ((tmp = getenv(mac)) != NULL) {
471 sprintf(enet, "ethernet%d", i);
472 path = fdt_getprop(fdt, node, enet, NULL);
474 debug("No alias for %s\n", enet);
475 sprintf(mac, "eth%daddr", ++i);
479 for (j = 0; j < 6; j++) {
480 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
482 tmp = (*end) ? end+1 : end;
485 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
486 do_fixup_by_path(fdt, path, "local-mac-address",
489 sprintf(mac, "eth%daddr", ++i);
493 /* Resize the fdt to its actual size + a bit of padding */
494 int fdt_resize(void *blob)
504 total = fdt_num_mem_rsv(blob);
505 for (i = 0; i < total; i++) {
506 fdt_get_mem_rsv(blob, i, &addr, &size);
507 if (addr == (uintptr_t)blob) {
508 fdt_del_mem_rsv(blob, i);
514 * Calculate the actual size of the fdt
515 * plus the size needed for 5 fdt_add_mem_rsv, one
516 * for the fdt itself and 4 for a possible initrd
517 * ((initrd-start + initrd-end) * 2 (name & value))
519 actualsize = fdt_off_dt_strings(blob) +
520 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
522 /* Make it so the fdt ends on a page boundary */
523 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
524 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
526 /* Change the fdt header to reflect the correct size */
527 fdt_set_totalsize(blob, actualsize);
529 /* Add the new reservation */
530 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
538 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
540 #define FDT_PCI_PREFETCH (0x40000000)
541 #define FDT_PCI_MEM32 (0x02000000)
542 #define FDT_PCI_IO (0x01000000)
543 #define FDT_PCI_MEM64 (0x03000000)
545 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
547 int addrcell, sizecell, len, r;
549 /* sized based on pci addr cells, size-cells, & address-cells */
550 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
552 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
553 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
555 dma_range = &dma_ranges[0];
556 for (r = 0; r < hose->region_count; r++) {
557 u64 bus_start, phys_start, size;
559 /* skip if !PCI_REGION_SYS_MEMORY */
560 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
563 bus_start = (u64)hose->regions[r].bus_start;
564 phys_start = (u64)hose->regions[r].phys_start;
565 size = (u64)hose->regions[r].size;
568 if (size >= 0x100000000ull)
569 dma_range[0] |= FDT_PCI_MEM64;
571 dma_range[0] |= FDT_PCI_MEM32;
572 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
573 dma_range[0] |= FDT_PCI_PREFETCH;
574 #ifdef CONFIG_SYS_PCI_64BIT
575 dma_range[1] = bus_start >> 32;
579 dma_range[2] = bus_start & 0xffffffff;
582 dma_range[3] = phys_start >> 32;
583 dma_range[4] = phys_start & 0xffffffff;
585 dma_range[3] = phys_start & 0xffffffff;
589 dma_range[3 + addrcell + 0] = size >> 32;
590 dma_range[3 + addrcell + 1] = size & 0xffffffff;
592 dma_range[3 + addrcell + 0] = size & 0xffffffff;
595 dma_range += (3 + addrcell + sizecell);
598 len = dma_range - &dma_ranges[0];
600 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
606 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
608 * Provide a weak default function to return the flash bank size.
609 * There might be multiple non-identical flash chips connected to one
610 * chip-select, so we need to pass an index as well.
612 u32 __flash_get_bank_size(int cs, int idx)
614 extern flash_info_t flash_info[];
617 * As default, a simple 1:1 mapping is provided. Boards with
618 * a different mapping need to supply a board specific mapping
621 return flash_info[cs].size;
623 u32 flash_get_bank_size(int cs, int idx)
624 __attribute__((weak, alias("__flash_get_bank_size")));
627 * This function can be used to update the size in the "reg" property
628 * of all NOR FLASH device nodes. This is necessary for boards with
629 * non-fixed NOR FLASH sizes.
631 int fdt_fixup_nor_flash_size(void *blob)
633 char compat[][16] = { "cfi-flash", "jedec-flash" };
636 struct fdt_property *prop;
640 for (i = 0; i < 2; i++) {
641 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
642 while (off != -FDT_ERR_NOTFOUND) {
646 * Found one compatible node, so fixup the size
647 * int its reg properties
649 prop = fdt_get_property_w(blob, off, "reg", &len);
651 int tuple_size = 3 * sizeof(reg);
654 * There might be multiple reg-tuples,
655 * so loop through them all
657 reg = reg2 = (u32 *)&prop->data[0];
658 for (idx = 0; idx < (len / tuple_size); idx++) {
660 * Update size in reg property
662 reg[2] = flash_get_bank_size(reg[0],
666 * Point to next reg tuple
671 fdt_setprop(blob, off, "reg", reg2, len);
674 /* Move to next compatible node */
675 off = fdt_node_offset_by_compatible(blob, off,
684 int fdt_increase_size(void *fdt, int add_len)
688 newlen = fdt_totalsize(fdt) + add_len;
690 /* Open in place with a new len */
691 return fdt_open_into(fdt, fdt, newlen);
694 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
695 #include <jffs2/load_kernel.h>
696 #include <mtd_node.h>
703 int fdt_del_subnodes(const void *blob, int parent_offset)
708 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
709 (off >= 0) && (ndepth > 0);
710 off = fdt_next_node(blob, off, &ndepth)) {
712 debug("delete %s: offset: %x\n",
713 fdt_get_name(blob, off, 0), off);
714 ret = fdt_del_node((void *)blob, off);
716 printf("Can't delete node: %s\n",
728 int fdt_del_partitions(void *blob, int parent_offset)
735 off = fdt_next_node(blob, parent_offset, &ndepth);
736 if (off > 0 && ndepth == 1) {
737 prop = fdt_getprop(blob, off, "label", NULL);
740 * Could not find label property, nand {}; node?
741 * Check subnode, delete partitions there if any.
743 return fdt_del_partitions(blob, off);
745 ret = fdt_del_subnodes(blob, parent_offset);
747 printf("Can't remove subnodes: %s\n",
756 int fdt_node_set_part_info(void *blob, int parent_offset,
757 struct mtd_device *dev)
759 struct list_head *pentry;
760 struct part_info *part;
761 struct reg_cell cell;
766 ret = fdt_del_partitions(blob, parent_offset);
771 * Check if it is nand {}; subnode, adjust
772 * the offset in this case
774 off = fdt_next_node(blob, parent_offset, &ndepth);
775 if (off > 0 && ndepth == 1)
779 list_for_each_prev(pentry, &dev->parts) {
782 part = list_entry(pentry, struct part_info, link);
784 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
785 part_num, part->name, part->size,
786 part->offset, part->mask_flags);
788 sprintf(buf, "partition@%x", part->offset);
790 ret = fdt_add_subnode(blob, parent_offset, buf);
791 if (ret == -FDT_ERR_NOSPACE) {
792 ret = fdt_increase_size(blob, 512);
797 } else if (ret < 0) {
798 printf("Can't add partition node: %s\n",
804 /* Check MTD_WRITEABLE_CMD flag */
805 if (part->mask_flags & 1) {
807 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
808 if (ret == -FDT_ERR_NOSPACE) {
809 ret = fdt_increase_size(blob, 512);
818 cell.r0 = cpu_to_fdt32(part->offset);
819 cell.r1 = cpu_to_fdt32(part->size);
821 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
822 if (ret == -FDT_ERR_NOSPACE) {
823 ret = fdt_increase_size(blob, 512);
832 ret = fdt_setprop_string(blob, newoff, "label", part->name);
833 if (ret == -FDT_ERR_NOSPACE) {
834 ret = fdt_increase_size(blob, 512);
846 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
849 printf("Can't add property: %s\n", fdt_strerror(ret));
854 * Update partitions in nor/nand nodes using info from
855 * mtdparts environment variable. The nodes to update are
856 * specified by node_info structure which contains mtd device
857 * type and compatible string: E. g. the board code in
858 * ft_board_setup() could use:
860 * struct node_info nodes[] = {
861 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
862 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
865 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
867 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
869 struct node_info *ni = node_info;
870 struct mtd_device *dev;
875 parts = getenv("mtdparts");
879 if (mtdparts_init() != 0)
882 for (i = 0; i < node_info_size; i++) {
884 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
885 while (noff != -FDT_ERR_NOTFOUND) {
886 debug("%s: %s, mtd dev type %d\n",
887 fdt_get_name(blob, noff, 0),
888 ni[i].compat, ni[i].type);
889 dev = device_find(ni[i].type, idx++);
891 if (fdt_node_set_part_info(blob, noff, dev))
892 return; /* return on error */
895 /* Jump to next flash node */
896 noff = fdt_node_offset_by_compatible(blob, noff,
903 void fdt_del_node_and_alias(void *blob, const char *alias)
905 int off = fdt_path_offset(blob, alias);
910 fdt_del_node(blob, off);
912 off = fdt_path_offset(blob, "/aliases");
913 fdt_delprop(blob, off, alias);
916 /* Helper to read a big number; size is in cells (not bytes) */
917 static inline u64 of_read_number(const fdt32_t *cell, int size)
921 r = (r << 32) | fdt32_to_cpu(*(cell++));
927 /* Max address size we deal with */
928 #define OF_MAX_ADDR_CELLS 4
929 #define OF_BAD_ADDR ((u64)-1)
930 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
935 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
939 printf(" %08x", *(addr++));
943 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
946 /* Callbacks for bus specific translators */
949 const char *addresses;
950 void (*count_cells)(void *blob, int parentoffset,
951 int *addrc, int *sizec);
952 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
953 int na, int ns, int pna);
954 int (*translate)(fdt32_t *addr, u64 offset, int na);
957 /* Default translator (generic bus) */
958 static void of_bus_default_count_cells(void *blob, int parentoffset,
959 int *addrc, int *sizec)
964 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
966 *addrc = be32_to_cpup(prop);
972 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
974 *sizec = be32_to_cpup(prop);
980 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
981 int na, int ns, int pna)
985 cp = of_read_number(range, na);
986 s = of_read_number(range + na + pna, ns);
987 da = of_read_number(addr, na);
989 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
992 if (da < cp || da >= (cp + s))
997 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
999 u64 a = of_read_number(addr, na);
1000 memset(addr, 0, na * 4);
1003 addr[na - 2] = cpu_to_fdt32(a >> 32);
1004 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1009 /* Array of bus specific translators */
1010 static struct of_bus of_busses[] = {
1015 .count_cells = of_bus_default_count_cells,
1016 .map = of_bus_default_map,
1017 .translate = of_bus_default_translate,
1021 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1022 struct of_bus *pbus, fdt32_t *addr,
1023 int na, int ns, int pna, const char *rprop)
1025 const fdt32_t *ranges;
1028 u64 offset = OF_BAD_ADDR;
1030 /* Normally, an absence of a "ranges" property means we are
1031 * crossing a non-translatable boundary, and thus the addresses
1032 * below the current not cannot be converted to CPU physical ones.
1033 * Unfortunately, while this is very clear in the spec, it's not
1034 * what Apple understood, and they do have things like /uni-n or
1035 * /ht nodes with no "ranges" property and a lot of perfectly
1036 * useable mapped devices below them. Thus we treat the absence of
1037 * "ranges" as equivalent to an empty "ranges" property which means
1038 * a 1:1 translation at that level. It's up to the caller not to try
1039 * to translate addresses that aren't supposed to be translated in
1040 * the first place. --BenH.
1042 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1043 if (ranges == NULL || rlen == 0) {
1044 offset = of_read_number(addr, na);
1045 memset(addr, 0, pna * 4);
1046 debug("OF: no ranges, 1:1 translation\n");
1050 debug("OF: walking ranges...\n");
1052 /* Now walk through the ranges */
1054 rone = na + pna + ns;
1055 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1056 offset = bus->map(addr, ranges, na, ns, pna);
1057 if (offset != OF_BAD_ADDR)
1060 if (offset == OF_BAD_ADDR) {
1061 debug("OF: not found !\n");
1064 memcpy(addr, ranges + na, 4 * pna);
1067 of_dump_addr("OF: parent translation for:", addr, pna);
1068 debug("OF: with offset: "PRu64"\n", offset);
1070 /* Translate it into parent bus space */
1071 return pbus->translate(addr, offset, pna);
1075 * Translate an address from the device-tree into a CPU physical address,
1076 * this walks up the tree and applies the various bus mappings on the
1079 * Note: We consider that crossing any level with #size-cells == 0 to mean
1080 * that translation is impossible (that is we are not dealing with a value
1081 * that can be mapped to a cpu physical address). This is not really specified
1082 * that way, but this is traditionally the way IBM at least do things
1084 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1088 struct of_bus *bus, *pbus;
1089 fdt32_t addr[OF_MAX_ADDR_CELLS];
1090 int na, ns, pna, pns;
1091 u64 result = OF_BAD_ADDR;
1093 debug("OF: ** translation for device %s **\n",
1094 fdt_get_name(blob, node_offset, NULL));
1096 /* Get parent & match bus type */
1097 parent = fdt_parent_offset(blob, node_offset);
1100 bus = &of_busses[0];
1102 /* Cound address cells & copy address locally */
1103 bus->count_cells(blob, parent, &na, &ns);
1104 if (!OF_CHECK_COUNTS(na, ns)) {
1105 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1106 fdt_get_name(blob, node_offset, NULL));
1109 memcpy(addr, in_addr, na * 4);
1111 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1112 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1113 of_dump_addr("OF: translating address:", addr, na);
1117 /* Switch to parent bus */
1118 node_offset = parent;
1119 parent = fdt_parent_offset(blob, node_offset);
1121 /* If root, we have finished */
1123 debug("OF: reached root node\n");
1124 result = of_read_number(addr, na);
1128 /* Get new parent bus and counts */
1129 pbus = &of_busses[0];
1130 pbus->count_cells(blob, parent, &pna, &pns);
1131 if (!OF_CHECK_COUNTS(pna, pns)) {
1132 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1133 fdt_get_name(blob, node_offset, NULL));
1137 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1138 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1140 /* Apply bus translation */
1141 if (of_translate_one(blob, node_offset, bus, pbus,
1142 addr, na, ns, pna, rprop))
1145 /* Complete the move up one level */
1150 of_dump_addr("OF: one level translation:", addr, na);
1157 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1159 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1163 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1164 * who's reg property matches a physical cpu address
1166 * @blob: ptr to device tree
1167 * @compat: compatiable string to match
1168 * @compat_off: property name
1171 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1172 phys_addr_t compat_off)
1174 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1175 while (off != -FDT_ERR_NOTFOUND) {
1176 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1178 if (compat_off == fdt_translate_address(blob, off, reg))
1181 off = fdt_node_offset_by_compatible(blob, off, compat);
1184 return -FDT_ERR_NOTFOUND;
1188 * fdt_alloc_phandle: Return next free phandle value
1190 * @blob: ptr to device tree
1192 int fdt_alloc_phandle(void *blob)
1194 int offset, phandle = 0;
1196 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1197 offset = fdt_next_node(blob, offset, NULL)) {
1198 phandle = max(phandle, fdt_get_phandle(blob, offset));
1205 * fdt_set_phandle: Create a phandle property for the given node
1207 * @fdt: ptr to device tree
1208 * @nodeoffset: node to update
1209 * @phandle: phandle value to set (must be unique)
1211 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1216 int off = fdt_node_offset_by_phandle(fdt, phandle);
1218 if ((off >= 0) && (off != nodeoffset)) {
1221 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1222 printf("Trying to update node %s with phandle %u ",
1225 fdt_get_path(fdt, off, buf, sizeof(buf));
1226 printf("that already exists in node %s.\n", buf);
1227 return -FDT_ERR_BADPHANDLE;
1231 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1236 * For now, also set the deprecated "linux,phandle" property, so that we
1237 * don't break older kernels.
1239 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1245 * fdt_create_phandle: Create a phandle property for the given node
1247 * @fdt: ptr to device tree
1248 * @nodeoffset: node to update
1250 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1252 /* see if there is a phandle already */
1253 int phandle = fdt_get_phandle(fdt, nodeoffset);
1255 /* if we got 0, means no phandle so create one */
1259 phandle = fdt_alloc_phandle(fdt);
1260 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1262 printf("Can't set phandle %u: %s\n", phandle,
1272 * fdt_set_node_status: Set status for the given node
1274 * @fdt: ptr to device tree
1275 * @nodeoffset: node to update
1276 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1277 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1278 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1280 int fdt_set_node_status(void *fdt, int nodeoffset,
1281 enum fdt_status status, unsigned int error_code)
1290 case FDT_STATUS_OKAY:
1291 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1293 case FDT_STATUS_DISABLED:
1294 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1296 case FDT_STATUS_FAIL:
1297 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1299 case FDT_STATUS_FAIL_ERROR_CODE:
1300 sprintf(buf, "fail-%d", error_code);
1301 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1304 printf("Invalid fdt status: %x\n", status);
1313 * fdt_set_status_by_alias: Set status for the given node given an alias
1315 * @fdt: ptr to device tree
1316 * @alias: alias of node to update
1317 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1318 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1319 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1321 int fdt_set_status_by_alias(void *fdt, const char* alias,
1322 enum fdt_status status, unsigned int error_code)
1324 int offset = fdt_path_offset(fdt, alias);
1326 return fdt_set_node_status(fdt, offset, status, error_code);
1329 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1330 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1335 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1336 if (noff != -FDT_ERR_NOTFOUND) {
1337 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1339 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1340 if (ret == -FDT_ERR_NOSPACE) {
1341 ret = fdt_increase_size(blob, 512);
1346 } else if (ret < 0) {
1347 printf("Can't add property: %s\n", fdt_strerror(ret));
1353 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1359 * Verify the physical address of device tree node for a given alias
1361 * This function locates the device tree node of a given alias, and then
1362 * verifies that the physical address of that device matches the given
1363 * parameter. It displays a message if there is a mismatch.
1365 * Returns 1 on success, 0 on failure
1367 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1374 path = fdt_getprop(fdt, anode, alias, NULL);
1376 /* If there's no such alias, then it's not a failure */
1380 node = fdt_path_offset(fdt, path);
1382 printf("Warning: device tree alias '%s' points to invalid "
1383 "node %s.\n", alias, path);
1387 reg = fdt_getprop(fdt, node, "reg", &len);
1389 printf("Warning: device tree node '%s' has no address.\n",
1394 dt_addr = fdt_translate_address(fdt, node, reg);
1395 if (addr != dt_addr) {
1396 printf("Warning: U-Boot configured device %s at address %llx,\n"
1397 " but the device tree has it address %llx.\n",
1398 alias, addr, dt_addr);
1406 * Returns the base address of an SOC or PCI node
1408 u64 fdt_get_base_address(void *fdt, int node)
1412 const fdt32_t *prop;
1414 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1415 if (prop && size == 4)
1416 naddr = be32_to_cpup(prop);
1420 prop = fdt_getprop(fdt, node, "ranges", &size);
1422 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;